Junior-high student Tatsuki begins to feel burdened by the lunches his mother makes and decides he wants to prepare his own. With advice from Mashiro, an older student who knows cooking, and support from his childhood friend Kaho, his efforts unsettle the roles his family has taken for granted and test his wish to choose his own way of living.

A story of a junior-high student's independence and family, beginning with the decision to make his own lunch.